How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 11/22100.0*Serie B100.0*Average seed
Bahia 1 Atlético-PR 2 -1.9
+0.1
Week of 11/29100.0*Serie B100.0*Average seed
Flamengo 4 Vitória 0 +21.9
-0.5
Internacional 3 Palmeiras 1 -9.8
+0.1
Atlético-MG 1 Coritiba 2 +1.7
-0.0
Bahia 1 Grêmio 0 -0.1
Santos 2 Botafogo 0 +0.1
Week of 12/6100.0*Serie B100.0*Average seed
Vitória 0 Santos 1 Yes
-0.4
Palmeiras 1 Atlético-PR 1 -13.1
+0.1
Coritiba 3 Bahia 2 +0.2
Points  (Full Screen)
Chance Will Win Championship  (Full Screen)